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  • c++ casting base class to derived class mess

    - by alan2here
    If I were to create a base class called base and derived classes called derived_1, derived_2 etc... I use a collection of instances of the base class, then when I retrieved an element and tried to use it I would find that C++ thinks it's type is that of the base class, probably because I retrieved it from a std::vector of base. Which is a problem when I want to use features that only exist for the specific derived class who's type I knew this object was when I put it into the vector. So I cast the element into the type it is supposed to be and found this wouldn't work. (derived_3)obj_to_be_fixed; And remembered that it's a pointer thing. After some tweaking this now worked. *((derived_3*)&obj_to_be_fixed); Is this right or is there for example an abc_cast() function that does it with less mess?

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  • class hierarchy design for small java project

    - by user523956
    I have written a java code which does following:- Main goal is to fetch emails from (inbox, spam) folders and store them in database. It fetches emails from gmail,gmx,web.de,yahoo and Hotmail. Following attributes are stored in mysql database. Slno, messagedigest, messageid, foldername, dateandtime, receiver, sender, subject, cc, size and emlfile. For gmail,gmy and web.de, I have used javamail API, because email form it can be fetched with IMAP. For yahoo and hotmail, I have used html parser and httpclient to fetch emails form spam folder and for inbox folder, I have used pop3 javamail API. I want to have proper class hierarchy which makes my code efficient and easily reusable. As of now I have designed class hierarchy as below: I am sure it can still be improved. So I would like to have different opinions on it. I have following classes and methods as of now. MainController:- Here I pass emailid, password and foldername from which emails have to be fetched. Abstract Class :-EmailProtocol Abstract Methods of it (All methods except executeParser contains method definition):- connectImap() // used by gmx,gmail and web.de email ids connectPop3() // used by hotmail and yahoo to fetch emails of inbox folder createMessageDigest // used by every email provider(gmx, gmail,web.de,yahoo,hotmail) establishDBConnection // used by every email emailAlreadyExists // used by every email which checks whether email already exists in db or not, if not then store it. storeemailproperties // used by every email to store emails properties to mysql database executeParser // nothing written in it. Overwridden and used by just hotmail and yahoo to fetch emails form spam folder. Imap extends EmailProtocol (nothing in it. But I have to have it to access methods of EmailProtocol. This is used to fetch emails from gmail,gmx and web.de) I know this is really a bad way but don't know how to do it other way. Hotmsil extends EmailProtocol Methods:- executeParser() :- This is used by just hotmail email id. fetchjunkemails() :- This is also very specific for only hotmail email id. Yahoo extends EmailProtocol Methods:- executeParser() storeEmailtotemptable() MoveEmailtoInbox() getFoldername() nullorEquals() All above methods are specific for yahoo email id. public DateTimeFormat(class) format() //this formats datetime of gmax,gmail and web.de emails. formatYahoodate //this formats datetime of yahoo email. formatHotmaildate // this formats datetime of hotmail email. public StringFormat ConvertStreamToString() // Accessed by every class except DateTimeFormat class. formatFromTo() // Accessed by every class except DateTimeFormat class. public Class CheckDatabaseExistance public static void checkForDatabaseTablesAvailability() (This method checks at the beginnning whether database and required tables exist in mysql or not. if not it creates them) Please see code of my MainController class so that You can have an idea about how I use different classes. public class MainController { public static void main(String[] args) throws Exception { ArrayList<String> web_de_folders = new ArrayList<String>(); web_de_folders.add("INBOX"); web_de_folders.add("Unbekannt"); web_de_folders.add("Spam"); web_de_folders.add("OUTBOX"); web_de_folders.add("SENT"); web_de_folders.add("DRAFTS"); web_de_folders.add("TRASH"); web_de_folders.add("Trash"); ArrayList<String> gmx_folders = new ArrayList<String>(); gmx_folders.add("INBOX"); gmx_folders.add("Archiv"); gmx_folders.add("Entwürfe"); gmx_folders.add("Gelöscht"); gmx_folders.add("Gesendet"); gmx_folders.add("Spamverdacht"); gmx_folders.add("Trash"); ArrayList<String> gmail_folders = new ArrayList<String>(); gmail_folders.add("Inbox"); gmail_folders.add("[Google Mail]/Spam"); gmail_folders.add("[Google Mail]/Trash"); gmail_folders.add("[Google Mail]/Sent Mail"); ArrayList<String> pop3_folders = new ArrayList<String>(); pop3_folders.add("INBOX"); CheckDatabaseExistance.checkForDatabaseTablesAvailability(); EmailProtocol imap = new Imap(); System.out.println("CHECKING FOR NEW EMAILS IN WEB.DE...(IMAP)"); System.out.println("*********************************************************************************"); imap.connectImap("[email protected]", "pwd", web_de_folders); System.out.println("\nCHECKING FOR NEW EMAILS IN GMX.DE...(IMAP)"); System.out.println("*********************************************************************************"); imap.connectImap("[email protected]", "pwd", gmx_folders); System.out.println("\nCHECKING FOR NEW EMAILS IN GMAIL...(IMAP)"); System.out.println("*********************************************************************************"); imap.connectImap("[email protected]", "pwd", gmail_folders); EmailProtocol yahoo = new Yahoo(); Yahoo y=new Yahoo(); System.out.println("\nEXECUTING YAHOO PARSER"); System.out.println("*********************************************************************************"); y.executeParser("http://de.mc1321.mail.yahoo.com/mc/welcome?ymv=0","[email protected]","pwd"); System.out.println("\nCHECKING FOR NEW EMAILS IN INBOX OF YAHOO (POP3)"); System.out.println("*********************************************************************************"); yahoo.connectPop3("[email protected]","pwd",pop3_folders); System.out.println("\nCHECKING FOR NEW EMAILS IN INBOX OF HOTMAIL (POP3)"); System.out.println("*********************************************************************************"); yahoo.connectPop3("[email protected]","pwd",pop3_folders); EmailProtocol hotmail = new Hotmail(); Hotmail h=new Hotmail(); System.out.println("\nEXECUTING HOTMAIL PARSER"); System.out.println("*********************************************************************************"); h.executeParser("https://login.live.com/ppsecure/post.srf","[email protected]","pwd"); } } I have kept DatetimeFormat and StringFormat class public so that I can access its public methods by just (DatetimeFormat.formatYahoodate for e.g. from different methods). This is the first time I have developed something in java. It serves its purpose but of course code is still not so efficient I think. I need your suggestions on this project.

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  • Class Design and Structure Online Web Store

    - by Phorce
    I hope I have asked this in the right forum. Basically, we're designing an Online Store and I am designing the class structure for ordering a product and want some clarification on what I have so far: So a customer comes, selects their product, chooses the quantity and selects 'Purchase' (I am using the Facade Pattern - So subsystems execute when this action is performed). My class structure: < Order > < Product > <Customer > There is no inheritance, more Association < Order has < Product , < Customer has < Order . Does this structure look ok? I've noticed that I don't handle the "Quantity" separately, I was just going to add this into the "Product" class, but, do you think it should be a class of it's own? Hope someone can help.

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  • DataAnnotation attributes buddy class strangeness - ASP.NET MVC

    - by JK
    Given this POCO class that was automatically generated by an EntityFramework T4 template (has not and can not be manually edited in any way): public partial class Customer { [Required] [StringLength(20, ErrorMessage = "Customer Number - Please enter no more than 20 characters.")] [DisplayName("Customer Number")] public virtual string CustomerNumber { get;set; } [Required] [StringLength(10, ErrorMessage = "ACNumber - Please enter no more than 10 characters.")] [DisplayName("ACNumber")] public virtual string ACNumber{ get;set; } } Note that "ACNumber" is a badly named database field, so the autogenerator is unable to generate the correct display name and error message which should be "Account Number". So we manually create this buddy class to add custom attributes that could not be automatically generated: [MetadataType(typeof(CustomerAnnotations))] public partial class Customer { } public class CustomerAnnotations { [NumberCode] // This line does not work public virtual string CustomerNumber { get;set; } [StringLength(10, ErrorMessage = "Account Number - Please enter no more than 10 characters.")] [DisplayName("Account Number")] public virtual string ACNumber { get;set; } } Where [NumberCode] is a simple regex based attribute that allows only digits and hyphens: [AttributeUsage(AttributeTargets.Property)] public class NumberCodeAttribute: RegularExpressionAttribute { private const string REGX = @"^[0-9-]+$"; public NumberCodeAttribute() : base(REGX) { } } NOW, when I load the page, the DisplayName attribute works correctly - it shows the display name from the buddy class not the generated class. The StringLength attribute does not work correctly - it shows the error message from the generated class ("ACNumber" instead of "Account Number"). BUT the [NumberCode] attribute in the buddy class does not even get applied to the AccountNumber property: foreach (ValidationAttribute attrib in prop.Attributes.OfType<ValidationAttribute>()) { // This collection correctly contains all the [Required], [StringLength] attributes // BUT does not contain the [NumberCode] attribute ApplyValidation(generator, attrib); } Why does the prop.Attributes.OfType<ValidationAttribute>() collection not contain the [NumberCode] attribute? NumberCode inherits RegularExpressionAttribute which inherits ValidationAttribute so it should be there. If I manually move the [NumberCode] attribute to the autogenerated class, then it is included in the prop.Attributes.OfType<ValidationAttribute>() collection. So what I don't understand is why this particular attribute does not work in when in the buddy class, when other attributes in the buddy class do work. And why this attribute works in the autogenerated class, but not in the buddy. Any ideas? Also why does DisplayName get overriden by the buddy, when StringLength does not?

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  • UML - Class Diagrams Order -> Products

    - by Phorce
    I have a class diagram that is like this: < Order > (1) CAN HAVE (M) < products > But therefore "Order" has the following: Order_Id Customer_Id Order_date_day Order_date_month Order_date_yeah But I do not know how it would handle the Products? Because, I couldn't have "ProductID" because that would mean that each item in this class would have to have a separate instance for each product (E.g. someone ordered 100 products, but only placed 1 order). Could I have an Product object in class Order? If so, how do you represent that in UML? Thank you

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  • UML Class Diagram: Abstract or Interface?

    - by J Smith
    I am modeling a class diagram and have spotted an opportunity to simplify it slightly. What I want to know is, would this it be better to implement an abstract class or an interface? The scenario is this, I have the classes: Artist Genre Album Song All of which share the methods getName, setName, and getCount (playcount that is). Would it be best to create an abstract 'Music' class with the aforementioned abstract methods, or should I create an interface, since the classes that implement the interface have to include all of the interface's methods (I think, correct me if I'm wrong). I hope I've given enough detail, please ask questions if I haven't. Thanks!

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  • Abstract Base Class or Class?

    - by Mohit Deshpande
    For my semester project, my team and I are supposed to make a .jar file (library, not runnable) that contains a game development framework and demonstrate the concepts of OOP. Its supposed to be a FRAMEWORK and another team is supposed to use our framework and vice-versa. So I want to know how we should start. We thought of several approaches: 1. Start with a plain class public class Enemy { public Enemy(int x, int y, int health, int attack, ...) { ... } ... } public class UserDefinedClass extends Enemy { ... } 2. Start with an abstract class that user-defined enemies have to inherit abstract members public abstract class Enemy { public Enemy(int x, int y, int health, int attack, ...) { ... } public abstract void draw(); public abstract void destroy(); ... } public class UserDefinedClass extends Enemy { ... public void draw() { ... } public void destroy() { ... } } 3. Create a super ABC (Abstract Base Class) that ALL inherit from public abstract class VectorEntity { ... } public abstract class Enemy extends VectorEntity { ... } public class Player extends VectorEntity { ... } public class UserDefinedClass extends Enemy { ... } Which should I use? Or is there a better way?

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  • Class Design for special business rules

    - by Samuel Front
    I'm developing an application that allows people to place custom manufacturing orders. However, while most require similar paperwork, some of them have custom paperwork that only they require. My current class design has a Manufacturer class, of which of one of the member variables is an array of RequiredSubmission objects. However, there are two issues that I am somewhat concerned about. First, some manufacturers are willing to accept either a standard form or their own custom form. I'm thinking of storing this in the RequiredSubmission object, with an array of alternate forms that are a valid substitute. I'm not sure that this is ideal, however. The major issue, however, is that some manufacturers have deadline cycles. For example, forms A, B and C have to be delivered by January 1, while payment must be rendered by January 10. If you miss those, you'll have to wait until the next cycle. I'm not exactly sure how I can get this to work with my existing classes—how can I say "this set of dates all belong to the same cycle, with date A for form A, date B for form B, etc." I would greatly appreciate any insights on how to best design these classes.

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  • Nested class - calling the nested class from the parent class

    - by insanepaul
    I have a class whereby a method calls a nested class. I want to access the parent class properties from within the nested class. public class ParentClass { private x; private y; private z; something.something = new ChildClass public class ChildClass { need to get x, y and z; } } How do I access x,y and z from within the child class. Something to do with referencing the parent class but how? }

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  • Class design, One class in two sources

    - by Pavla
    Is it possible define methods from the same class in different "CPP" files? I have header file "myClass.h" with: class myClass { public: // methods for counting ... // methods for other ... }; I would like to define "methods for counting" in one CPP and "methods for other" in other CPP. For clarity. Both groups of methods sometime use the same attributes. Is it possible? Thanks :).

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  • DIV is picking max-width value as width value for DIV.

    - by Lokesh
    I am facing a problem after applying max-width hack for IE7. In mozilla, width of the div is flexible and adjustable as per the image width in the div. But in IE7 it is taking the max-width as width of DIV. Below is my HTML code: <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <link rel="stylesheet" type="text/css" media="all" href="style/food.css" /> <!--[if IE 7]> <link rel="stylesheet" type="text/css" media="screen" href="style/ie7.css" /> <![endif]--> </head> <body> <div class="main_content_inner_ko"> <div class="product_item"> <img src="images/product_icons/BigNTasty.png" alt="Big N&rsquo; Tasty"/><div class="small_title">Big N&rsquo; Tasty</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_images/x115/chicken/PremCrispyChickenRanchBLT.png" height="115" width="115" alt="Premium Cripsy Chicken Ranch BLT"/><div class="small_title">Premium Cripsy Chicken Ranch BLT</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_images/x115/sandwiches/FiletOFish.png" height="115" width="99" alt="Filet O Fish"/> <div class="small_title">Filet O Fish</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_icons/BigNTasty.png" height="115" width="99" alt="Big N&rsquo; Tasty"/> <div class="small_title">Big N&rsquo; Tasty</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_images/x115/chicken/PremCrispyChickenRanchBLT.png" height="115" width="115" alt="Premium Cripsy Chicken Ranch BLT"/> <div class="small_title">Premium Cripsy Chicken Ranch BLT</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_images/x115/sandwiches/FiletOFish.png" height="115" width="99" alt="Filet O Fish"/> <div class="small_title">Filet O Fish</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_icons/BigNTasty.png" height="115" width="99" alt="Big N&rsquo; Tasty"/> <div class="small_title">Big N&rsquo; Tasty</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_icons/BigNTasty.png" height="115" width="99" alt="Big N&rsquo; Tasty"/> <div class="small_title">Big N&rsquo; Tasty</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_images/x115/sandwiches/FiletOFish.png" height="115" width="99" alt="Filet O Fish"/> <div class="small_title">Filet O Fish</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_icons/BigNTasty.png" height="115" width="99" alt="Big N&rsquo; Tasty"/> <div class="small_title">Big N&rsquo; Tasty</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_icons/BigNTasty.png" height="115" width="99" alt="Big N&rsquo; Tasty"/> <div class="small_title">Big N&rsquo; Tasty</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_icons/BigNTasty.png" height="115" width="99" alt="Big N&rsquo; Tasty"/> <div class="small_title">Big N&rsquo; Tasty</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_images/x115/chicken/PremCrispyChickenRanchBLT.png" height="115" width="115" alt="Premium Cripsy Chicken Ranch BLT"/> <div class="small_title">Premium Cripsy Chicken Ranch BLT</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_images/x115/sandwiches/FiletOFish.png" height="115" width="99" alt="Filet O Fish"/> <div class="small_title">Filet O Fish</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="product_item"> <img src="images/product_icons/BigNTasty.png" height="115" width="99" alt="Big N&rsquo; Tasty"/> <div class="small_title">Big N&rsquo; Tasty</div> <table class="product_information" cellpadding="0" border="0" cellspacing="0"> <tbody> <tr> <td class="red_bold"></td> <td></td> <td class="small_italic">(Daily Value)</td> </tr> <tr> <td class="red_bold">Calories</td> <td>460</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Total Fat</td> <td>24g</td> <td class="small_italic">(37%)</td> </tr> <tr> <td class="red_bold">Carbs</td> <td>37g</td> <td class="small_italic">(12%)</td> </tr> <tr> <td class="red_bold">Protein</td> <td>24g</td> <td class="small_italic"></td> </tr> <tr> <td class="red_bold">Sodium</td> <td>720mg</td> <td class="small_italic">(30%)</td> </tr> <tr> <td colspan="3" class="notes">Note: Values shown are for the default size and/or flavor.</td> </tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_learn_more_and_customize"></a></td></tr> <tr><td colspan="3"><a href="#" class="acts_as_button en_add_to_my_meal_builder"></a></td></tr> </tbody> </table> </div> <div class="clear"></div> </div> </body> Below is the css code: div.small_title { font-size: 10px; color: #929292; text-align: center; max-width: 115px; line-height: 13px; padding-top: 5px; margin: 0 auto; } .product_item { position: relative; float:left; min-width: 35px; max-width: 189px; width: auto !important; text-align:center; border: 1px solid #CCC; } Please help me! Cheers!! Lokesh Yadav

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  • In Ruby are there any related applications of the syntax: class << self ... end

    - by pez_dispenser
    class << self attr_accessor :n, :totalX, :totalY end The syntax above is used for defining class instance variables. But when I think about what syntax implies, it doesn't make any sense to me, so I'm wondering if this type of syntax is used for any other types of definitions. My point of confusion here is this: class << self The append operator normally means "add what's on the right to the object on the left". But in the context of this block, how does that add up to "put the contents of this block into the definition of the class instance rather than the instance"? For the same reason I'm confused as to why in one context class << self can define class instance variables while in another it seems to create class variables such as here: class Point # Instance methods go here class << self # Class methods go here end end

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  • UML class diagram - can aggregated object be part of two aggregated classes?

    - by user970696
    Some sources say that aggregation means that the class owns the object and shares reference. Lets assume an example where a company class holds a list of cars but departments of that company has list of cars used by them. class Department { list<Car> listOfCars; } class Company { list<Car> listOfCars; //initialization of the list } So in UML class diagram, I would do it like this. But I assume this is not allowed because it would imply that both company and department own the objects.. [COMPANY]<>------[CAR] [DEPARTMENT]<>---| //imagine this goes up to the car class

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  • Base class -> Derived class and vice-versa conversions in C++

    - by Ivan Nikolaev
    Hi! I have the following example code: #include <iostream> #include <string> using namespace std; class Event { public: string type; string source; }; class KeyEvent : public Event { public: string key; string modifier; }; class MouseEvent : public Event { public: string button; int x; int y; }; void handleEvent(KeyEvent e) { if(e.key == "ENTER") cout << "Hello world! The Enter key was pressed ;)" << endl; } Event generateEvent() { KeyEvent e; e.type = "KEYBOARD_EVENT"; e.source = "Keyboard0"; e.key = "SPACEBAR"; e.modifier = "none"; return e; } int main() { KeyEvent e = generateEvent(); return 0; } I can't compile it, G++ throws an error of kind: main.cpp: In function 'int main()': main.cpp:47:29: error: conversion from 'Event' to non-scalar type 'KeyEvent' requested I know that the error is obvious for C++ guru's, but I can't understand why I can't do the conversion from base class object to derived one. Can someone suggest me the solution of the problem that I have? Thx in advice

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  • 'abstract class' versus 'normal class' for a reusable library

    - by Greg
    I'm developing a reusable library and have been creating abstract classes, so the client can then extend from these. QUESTION: Is there any reason in fact I should use an abstract class here as opposed to just a normal class? Note - Have already decided I do not want to use interfaces as I want to include actual default methods in my library so the client using it doesn't have to write the code.

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  • Add LINQ Auto-Generated Value Marker [Column(IsDbGenerated=true)] in Buddy Class

    - by Alex
    Hello, is it possible to decorate a field of a LINQ generated class with [Column(IsDbGenerated=true)] using a buddy class (which is linked to the LINQ class via [MetadataType(typeof(BuddyMetadata))]) ? My goal is to be able to clear and repopulate the LINQ ORM designer without having to set the "Auto Generate Value" property manually every time to re-establish the fact that certain columns are autogenerated. Thanks!

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  • Abstract class + Inheritance vs Interface

    - by RealityDysfunction
    Hello fellow programmers, I am reading a book on C# and the author is comparing Abstract classes and Interfaces. He claims that if you have the following "abstract class:" abstract class CloneableType { public abstract object Clone(); } Then you cannot do this: public class MiniVan : Car, CloneableType {} This, I understand. However he claims that because of this inability to do multiple inheritance that you should use an interface for CloneableType, like so: public interface ICloneable { object Clone(); } My question is, isn't this somewhat misleading, because you can create an abstract class which is "above" class Car with the method Clone, then have Car inherit that class and then Minivan will inherit Car with all these methods, CloneAble class - Car class - Minivan Class. What do you think? Thanks.

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  • Why should I declare a class as an abstract class?

    - by Pied Piper
    I know the syntax, rules applied to abstract class and I want know usage of an abstract class Abstract class can not be instantiated directly but can be extended by other class What is the advantage of doing so? How it is different from an Interface? I know that one class can implement multiple interfaces but can only extend one abstract class. Is that only difference between an interface and an abstract class? I am aware about usage of an Interface. I have learned that from Event delegation model of AWT in Java. In which situations I should declare class as an abstract class? What is benefits of that?

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  • Python: query a class's parent-class after multiple derivations ("super()" does not work)

    - by henry
    Hi, I have built a class-system that uses multiple derivations of a baseclass (object-class1-class2-class3): class class1(object): def __init__(self): print "class1.__init__()" object.__init__(self) class class2(class1): def __init__(self): print "class2.__init__()" class1.__init__(self) class class3(class2): def __init__(self): print "class3.__init__()" class2.__init__(self) x = class3() It works as expected and prints: class3.__init__() class2.__init__() class1.__init__() Now I would like to replace the 3 lines object.__init__(self) ... class1.__init__(self) ... class2.__init__(self) with something like this: currentParentClass().__init__() ... currentParentClass().__init__() ... currentParentClass().__init__() So basically, i want to create a class-system where i don't have to type "classXYZ.doSomething()". As mentioned above, I want to get the "current class's parent-class". Replacing the three lines with: super(type(self), self).__init__() does NOT work (it always returns the parent-class of the current instance - class2) and will result in an endless loop printing: class3.__init__() class2.__init__() class2.__init__() class2.__init__() class2.__init__() ... So is there a function that can give me the current class's parent-class? Thank you for your help! Henry -------------------- Edit: @Lennart ok maybe i got you wrong but at the moment i think i didn't describe the problem clearly enough.So this example might explain it better: lets create another child-class class class4(class3): pass now what happens if we derive an instance from class4? y = class4() i think it clearly executes: super(class3, self).__init__() which we can translate to this: class2.__init__(y) this is definitly not the goal(that would be class3.__init__(y)) Now making lots of parent-class-function-calls - i do not want to re-implement all of my functions with different base-class-names in my super()-calls.

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  • How to use derived class shared variables in shared methods of base class

    - by KoolKabin
    Hi guys, I am trying to add shared members in derived classes and use that values in base classes... I have base class DBLayer public shared function GetDetail(byval UIN as integer) dim StrSql = string.format("select * from {0} where uin = {1}", tablename, uin) .... end function end class my derived class class User inherits dblayer public shared tabledname as string = "users" end class class item inherits dblayer public shared tabledname as string = "item" end class class category inherits dblayer public shared tabledname as string = "category" end class currently there is error using the tablename variable of derived class in base class but i want to use it... coz i dun know other techniques... if other solutions are better then u can post it or u can say how can i make it work? confused...

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  • Advantages of Singleton Class over Static Class?

    Point 1)Singleton We can get the object of singleton and then pass to other methods.Static Class We can not pass static class to other methods as we pass objectsPoint 2) Singleton In future, it is easy to change the logic of of creating objects to some pooling mechanism. Static Class Very difficult to implement some pooling logic in case of static class. We would need to make that class as non-static and then make all the methods non-static methods, So entire your code needs to be changed.Point3:) Singleton Can Singletone class be inherited to subclass? Singleton class does not say any restriction of Inheritence. So we should be able to do this as long as subclass is also inheritence.There's nothing fundamentally wrong with subclassing a class that is intended to be a singleton. There are many reasons you might want to do it. and there are many ways to accomplish it. It depends on language you use.Static Class We can not inherit Static class to another Static class in C#. Think about it this way: you access static members via type name, like this: MyStaticType.MyStaticMember(); Were you to inherit from that class, you would have to access it via the new type name: MyNewType.MyStaticMember(); Thus, the new item bears no relationships to the original when used in code. There would be no way to take advantage of any inheritance relationship for things like polymorphism. span.fullpost {display:none;}

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  • Advantages of Singleton Class over Static Class?

    Point 1) Singleton We can get the object of singleton and then pass to other methods. Static Class We can not pass static class to other methods as we pass objects Point 2) Singleton In future, it is easy to change the logic of of creating objects to some pooling mechanism. Static Class Very difficult to implement some pooling logic in case of static class. We would need to make that class as non-static and then make all the methods non-static methods, So entire your code needs to be changed. Point3:) Singleton Can Singletone class be inherited to subclass? Singleton class does not say any restriction of Inheritence. So we should be able to do this as long as subclass is also inheritence.There's nothing fundamentally wrong with subclassing a class that is intended to be a singleton. There are many reasons you might want to do it. and there are many ways to accomplish it. It depends on language you use. Static Class We can not inherit Static class to another Static class in C#. Think about it this way: you access static members via type name, like this: MyStaticType.MyStaticMember(); Were you to inherit from that class, you would have to access it via the new type name: MyNewType.MyStaticMember(); Thus, the new item bears no relationships to the original when used in code. There would be no way to take advantage of any inheritance relationship for things like polymorphism. span.fullpost {display:none;}

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  • Manager/Container class vs static class methods

    - by Ben
    Suppose I a have a Widget class that is part of a framework used independently by many applications. I create Widget instances in many situations and their lifetimes vary. In addition to Widget's instance specified methods, I would like to be able to perform the follow class wide operations: Find a single Widget instance based on a unique id Iterate over the list of all Widgets Remove a widget from the set of all widgets In order support these operations, I have been considering two approaches: Container class - Create some container or manager class, WidgetContainer, which holds a list of all Widget instances, support iteration and provides methods for Widget addition, removal and lookup. For example in C#: public class WidgetContainer : IEnumerable<Widget { public void AddWidget(Widget); public Widget GetWidget(WidgetId id); public void RemoveWidget(WidgetId id); } Static class methods - Add static class methods to Widget. For example: public class Widget { public Widget(WidgetId id); public static Widget GetWidget(WidgetId id); public static void RemoveWidget(WidgetId id); public static IEnumerable<Widget AllWidgets(); } Using a container class has the added problem of how to access the container class. Make it a singleton?..yuck! Create some World object that provides access to all such container classes? I have seen many frameworks that use the container class approach, so what is the general consensus?

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  • class inheretence of a attribute which is itself a class

    - by alex
    i have a class which inherets a attribute from a super-class. this attribute is a class itself. class classA(superClass): def func(self,x): if self.attributeB is None: do somthing and in the other class i have class superClass: self.attributB = classB() i get the error AttributeError: class classA has no attribute 'attributeB' when i access the attribute like i showed but if on command line i can see it works, x = classA() x.attributeB is None True so the test works. whats going on in the above code?

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